April 2020 - Page 20 of 66

Java Multithreading Concurrency Interview Questions and Answers — step-by-step Programming tutorial on Progressive Robot

Java Multithreading Concurrency Interview Questions and Answers

URL: https://www.progressiverobot.com/java-multithreading-concurrency-interview-questions-answers/ Today we will go through Java Multithreading Interview Questions and Answers. We will also look into Concurrency interview questions and answers because both multithreading and concurrency go hand in hand. Thread is one of the popular topics in java interview questions. Here I am listing down most of the important java multithreading interview […]

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How to Install Rust and Compile System Tools on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Rust and Compile System Tools on RHEL 7

  • April 22, 2020
  • Linux
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How to Install Rust and Compile System Tools on RHEL 7 Rust is a systems programming language that offers memory safety without a garbage collector, making it an ideal choice for building high-performance command-line utilities, daemons, and system-level tools. On RHEL 7, the system compiler and C runtime are older, but Rust’s installer rustup sidesteps […]

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Oracle Linux 8 — virt:ol — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — virt:ol — vulnerability — patch and remediation guide (ELSA-2020-2774)

  • April 22, 2020
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2774 Related CVEs: CVE-2019-20382 CVE-2020-8608 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How To Optimize Apache Web Server Performance — step-by-step Linux tutorial on Progressive Robot

How To Optimize Apache Web Server Performance

  • April 22, 2020
  • Linux
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Apache is an amazingly powerful and capable web server. In order to make initial setup as easy as possible, it comes with numerous modules pre-installed. This makes it a great choice for new projects when you need to quickly be productive, but as your site grows you may start to bump into performance problems. This tutorial will cover a few things you should do to optimize performance if you’re running Apache with your Django app.

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Oracle Linux 8 — python-lxml — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — python-lxml — vulnerability — patch and remediation guide (ELSA-2021-1898)

  • April 22, 2020
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1898 Related CVEs: CVE-2020-27783 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Android External Storage - Read, Write, Save File — step-by-step DevOps tutorial on Progressive Robot

Android External Storage – Read, Write, Save File

Android external storage can be used to write and save data, read configuration files etc. This article is continuation of the [Android Internal Storage](/community/tutorials/android-internal-storage-example-tutorial) tutorial in the series of tutorials on structured data storage in android. Android External Storage External storage such as SD card can also store application data, there's no security enforced upon […]

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Common Problems 113600

Windows Server 2012 R2 — RID master pool exhaustion approaching: new objects refused soon — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 07 July 2027 Affected versions: Windows Server 2012 R2 📖 ~2 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution — Primary Fix Solution — Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related […]

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FreeBSD 12 — openfire — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — openfire — multiple vulnerabilities (10 CVEs) — patch and remediation guide

  • April 21, 2020
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Openfire administration console authentication bypass Related CVEs: CVE-2008-1728 CVE-2008-6508 CVE-2008-6509 CVE-2008-6510 CVE-2008-6511 CVE-2009-0496 CVE-2009-0497 CVE-2009-1595  +2 more Upstream summary: [email protected] reports: Openfire's administrative console, a web-based application, was found to […]

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